/**
 *    Copyright 2009-2021 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis;

import org.apache.ibatis.datasource.pooled.PooledDataSource;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class ThreadLocalTest {

  // 这种的threadLocal是不会被回收的，所以不会存在问题，同时也可以每次使用完都remove一下
  public static ThreadLocal<String> threadLocal = new ThreadLocal<>();

  public static void main(String args[]) throws IOException {
    threadLocal.set("hello");
    new Thread(new Runnable() {
      @Override
      public void run() {
        System.out.println("一号线程:" + threadLocal.get());
        threadLocal.remove();
      }
    }).start();
    System.out.println("主线程:" + threadLocal.get());
    threadLocal.remove();

  }
}
